Mobil 1 0w40 in an older car with some work done?

[ryan2022]

Hi guys any reason NOT to use 0w40 in an older vehicle?

A friend of mine has an old Pontiac wagon he's put some work into, I think a cam, new heads etc.... he's running M1 15w50 right now, but is going a bit thinner.

He's a pretty loyal hard M1 user which is fine, but the availability of 0 weight M1 products around here is limited...actually its limited to 0w40. lol.

Any thoughts? I'd guess that it'd depend on the tolerancing in his engine on cold start.

 

[tig1]

M1 10-40HM from WM.

 

[ryan2022]

hmmm, maybe? Not sure if we get that stuff up here,

but that would be the best.

 

[Zaedock]

Originally Posted By: ryan2022
I'd guess that it'd depend on the tolerancing in his engine on cold start.


Why? His clearances are probably typical of most ICE's.

0W40 would work fine in his application.

 

[d00df00d]

Originally Posted By: ryan2022
He's a pretty loyal hard M1 user which is fine, but the availability of 0 weight M1 products around here is limited...actually its limited to 0w40. lol.

0w, not 0 weight. Two different things.


Originally Posted By: ryan2022
Any thoughts? I'd guess that it'd depend on the tolerancing in his engine on cold start.

Not at all.

You pick the big number depending on what the engine wants at operating temp. You pick the winter rating (the w number) depending on how hard the car is going to be on its oil (harder = higher W number) and how cold it's going to get (colder = lower W number), although you always want it to be as low as you can get away with.

Mobil 1 0w-40 is a great oil. He should be fine. I would recommend oil analysis to keep track of it; if by some chance it doesn't work out, he can switch to Mobil 1 10w-40.

 

[ryan2022]

Maybe it would work then.

This guy is funny though. Great guy...but funny. He wont use High mileage because of the extra wax.........same reason he says he wont use Quaker state.

 

[jstutz]

extra wax?

 

[ryan2022]

haha yeah. He's pretty old school with his opinions. He's been wrenching for a good long while.

No harm done, still a great guy, just hope we can find him some oil.

 

[Nickdfresh]

Originally Posted By: ryan2022
...
This guy is funny though. Great guy...but funny. He wont use High mileage because of the extra wax...


But that's the best part!

 

[Nickdfresh]

I used 0W-40 in a higher mileage Saturn with no problems whatsoever--other than it was thicker than what I really needed for the 1-2 mile commute to work I had in the middle of winter...

 

[OVERKILL]

It'll work just fine.

 

[fdcg27]

Why would you use such an expensive oil in an engine that would be quite happy with something much cheaper, with any reasonable drain interval?
This old Poncho might prefer something other than M1 0W-40.
If the guy is die-hard M1, how about M1 TDT 5W-40?
That would seem to be a good choice for this application.
If the guy likes M1 15W-50, why not try Mobil's very own Delvac 1300 15w40?
Much less expensive, and probably as good on reasonable drains as any M1.

 

[OVERKILL]

To the OP: Walmart has the TDT 5w40 BTW. Which as fdcg27 has pointed out, would be a good choice as well.

 

[LordAbbett]

He's running an aftermarket cam? Higher spring presssure?
If it were mine and just wanted Mobil I'd use the delvac 15W40

 

[ryan2022]

Originally Posted By: fdcg27
Why would you use such an expensive oil in an engine that would be quite happy with something much cheaper, with any reasonable drain interval?
This old Poncho might prefer something other than M1 0W-40.
If the guy is die-hard M1, how about M1 TDT 5W-40?
That would seem to be a good choice for this application.
If the guy likes M1 15W-50, why not try Mobil's very own Delvac 1300 15w40?
Much less expensive, and probably as good on reasonable drains as any M1.


That was my next suggestion to him the TDT 5w40. Actually devlac 15w40 would be the cats meow, and Id think Walmart has it.

Ryan

 

[addyguy]

I've never seen Delvac 15w40 in a Canadian store.

D1 or TDT 5W-40, yes, but not the conventional.

 

[38sho]

Originally Posted By: fdcg27
Why would you use such an expensive oil in an engine that would be quite happy with something much cheaper, with any reasonable drain interval?



says the guy running Mobil 1 in 90's accords.....

 

[Garak]

Originally Posted By: addyguy
I've never seen Delvac 15w40 in a Canadian store.


Me neither. For that, I go to a Husky Truck Stop or the local Esso/Mobil distributor. Oddly enough, the last 20L pail of Delvac 15w40 I bought was originally destined for a U.S. Walmart.